1 /*- 2 * Copyright (c) 1980, 1992, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#) Copyright (c) 1980, 1992, 1993 The Regents of the University of California. All rights reserved. 30 * @(#)main.c 8.1 (Berkeley) 6/6/93 31 * $FreeBSD: src/usr.bin/systat/main.c,v 1.11.2.1 2001/06/06 20:26:01 tmm Exp $ 32 */ 33 34 #include <sys/param.h> 35 #include <sys/time.h> 36 37 #include <err.h> 38 #include <limits.h> 39 #include <locale.h> 40 #include <nlist.h> 41 #include <signal.h> 42 #include <stdio.h> 43 #include <stdlib.h> 44 #include <unistd.h> 45 #include "systat.h" 46 #include "extern.h" 47 48 static struct nlist namelist[] = { 49 #define X_FIRST 0 50 #define X_HZ 0 51 { .n_name = "_hz" }, 52 #define X_STATHZ 1 53 { .n_name = "_stathz" }, 54 { .n_name = "" } 55 }; 56 static int dellave; 57 58 kvm_t *kd; 59 sig_t sigtstpdfl; 60 double avenrun[3]; 61 int WideMode; 62 int col; 63 double naptime = 5.0; 64 int verbose = 1; /* to report kvm read errs */ 65 int hz, stathz; 66 double hertz; 67 char c; 68 char *namp; 69 char hostname[MAXHOSTNAMELEN]; 70 WINDOW *wnd; 71 int CMDLINE; 72 73 static WINDOW *wload; /* one line window for load average */ 74 75 int 76 main(int argc, char **argv) 77 { 78 char errbuf[_POSIX2_LINE_MAX]; 79 char *op; 80 81 setlocale(LC_TIME, ""); 82 83 argc--, argv++; 84 while (argc > 0) { 85 op = argv[0]; 86 87 if (op[0] == '-' && op[1] && op[2] == 0) { 88 switch(op[1]) { 89 case 'w': 90 WideMode = 1; 91 break; 92 default: 93 fprintf(stderr, 94 "systat [-w] -cmd [interval]\n"); 95 fprintf(stderr, 96 " -pigs\n" 97 " -swap\n" 98 " -mb\n" 99 " -io\n" 100 " -vm\n" 101 " -pv\n" 102 " -netstat\n" 103 " -netbw\n" 104 " -pf\n" 105 " -icmp\n" 106 " -ip\n" 107 " -tcp\n" 108 " -ifstat\n" 109 " -altqs\n" 110 " -ip6\n" 111 " -icmp6\n" 112 " -sensors\n"); 113 exit(1); 114 } 115 } else if (op[0] == '-') { 116 struct cmdtab *p; 117 118 p = lookup(&argv[0][1]); 119 if (p == (struct cmdtab *)-1) 120 errx(1, "%s: ambiguous request", &argv[0][1]); 121 if (p == NULL) 122 errx(1, "%s: unknown request", &argv[0][1]); 123 curcmd = p; 124 } else { 125 naptime = strtod(argv[0], NULL); 126 if (naptime <= 0.0) 127 naptime = 5.0; 128 } 129 argc--, argv++; 130 } 131 kd = kvm_openfiles(NULL, NULL, NULL, O_RDONLY, errbuf); 132 if (kd == NULL) { 133 error("%s", errbuf); 134 exit(1); 135 } 136 signal(SIGINT, die); 137 signal(SIGQUIT, die); 138 signal(SIGTERM, die); 139 140 /* 141 * Initialize display. Load average appears in a one line 142 * window of its own. Current command's display appears in 143 * an overlapping sub-window of stdscr configured by the display 144 * routines to minimize update work by curses. 145 */ 146 initscr(); 147 CMDLINE = LINES - 1; 148 wnd = (*curcmd->c_open)(); 149 if (wnd == NULL) { 150 warnx("couldn't initialize display"); 151 die(0); 152 } 153 wload = newwin(1, 0, 3, 20); 154 if (wload == NULL) { 155 warnx("couldn't set up load average window"); 156 die(0); 157 } 158 if (kvm_nlist(kd, namelist)) { 159 nlisterr(namelist); 160 exit(1); 161 } 162 if (namelist[X_FIRST].n_type == 0) 163 errx(1, "couldn't read namelist"); 164 gethostname(hostname, sizeof (hostname)); 165 NREAD(X_HZ, &hz, sizeof(hz)); 166 NREAD(X_STATHZ, &stathz, sizeof(stathz)); 167 hertz = stathz ? stathz : hz; 168 (*curcmd->c_init)(); 169 curcmd->c_flags |= CF_INIT; 170 labels(); 171 172 dellave = 0.0; 173 174 signal(SIGALRM, display); 175 display(0); 176 noecho(); 177 crmode(); 178 keyboard(); 179 /*NOTREACHED*/ 180 181 return EXIT_SUCCESS; 182 } 183 184 void 185 labels(void) 186 { 187 if (curcmd->c_flags & CF_LOADAV) { 188 mvaddstr(2, 20, 189 "/0 /1 /2 /3 /4 /5 /6 /7 /8 /9 /10"); 190 mvaddstr(3, 5, "Load Average"); 191 } 192 (*curcmd->c_label)(); 193 #ifdef notdef 194 mvprintw(21, 25, "CPU usage on %s", hostname); 195 #endif 196 refresh(); 197 } 198 199 void 200 display(int signo __unused) 201 { 202 int i, j; 203 struct itimerval ctv; 204 205 /* Get the load average over the last minute. */ 206 (void) getloadavg(avenrun, NELEM(avenrun)); 207 (*curcmd->c_fetch)(); 208 if (curcmd->c_flags & CF_LOADAV) { 209 j = 5.0*avenrun[0] + 0.5; 210 dellave = avenrun[0]; 211 c = '|'; 212 wmove(wload, 0, 0); wclrtoeol(wload); 213 for (i = (j > 50) ? 50 : j; i > 0; i--) 214 waddch(wload, c); 215 if (j > 50) 216 wprintw(wload, " %4.1f", avenrun[0]); 217 } 218 (*curcmd->c_refresh)(); 219 if (curcmd->c_flags & CF_LOADAV) 220 wrefresh(wload); 221 wrefresh(wnd); 222 move(CMDLINE, col); 223 refresh(); 224 ctv.it_interval.tv_sec = 0; 225 ctv.it_interval.tv_usec = 0; 226 ctv.it_value.tv_sec = (int)naptime; 227 ctv.it_value.tv_usec = (naptime - (double)(int)naptime) * 1000000.0; 228 setitimer(ITIMER_REAL, &ctv, NULL); 229 } 230 231 void 232 load(void) 233 { 234 235 (void) getloadavg(avenrun, NELEM(avenrun)); 236 mvprintw(CMDLINE, 0, "%4.1f %4.1f %4.1f", 237 avenrun[0], avenrun[1], avenrun[2]); 238 clrtoeol(); 239 } 240 241 void 242 die(int signo __unused) 243 { 244 move(CMDLINE, 0); 245 clrtoeol(); 246 refresh(); 247 endwin(); 248 exit(0); 249 } 250 251 #include <stdarg.h> 252 253 void 254 error(const char *fmt, ...) 255 { 256 va_list ap; 257 char buf[255]; 258 int oy, ox; 259 va_start(ap, fmt); 260 261 if (wnd) { 262 getyx(stdscr, oy, ox); 263 (void) vsnprintf(buf, sizeof(buf), fmt, ap); 264 clrtoeol(); 265 standout(); 266 mvaddstr(CMDLINE, 0, buf); 267 standend(); 268 move(oy, ox); 269 refresh(); 270 } else { 271 (void) vfprintf(stderr, fmt, ap); 272 fprintf(stderr, "\n"); 273 } 274 va_end(ap); 275 } 276 277 void 278 nlisterr(struct nlist *n_list) 279 { 280 int i, n; 281 282 n = 0; 283 clear(); 284 mvprintw(2, 10, "systat: nlist: can't find following symbols:"); 285 for (i = 0; 286 n_list[i].n_name != NULL && *n_list[i].n_name != '\0'; i++) 287 if (n_list[i].n_value == 0) 288 mvprintw(2 + ++n, 10, "%s", n_list[i].n_name); 289 move(CMDLINE, 0); 290 clrtoeol(); 291 refresh(); 292 endwin(); 293 exit(1); 294 } 295